Water-tube boiler.



No. 652,866.' Patented July 3, I900.

L. TURGAN.

WATER TUBE BOILER.

(Application filed May 18, 1898.) (No Model.) 2 Sheets-Sheet THE annals PEYERs coy. snow-Una, WASHINGTON, a. c.

2 Sheets-Sheet 2.

' Patented July 3, I900.

L TUBGAN WATER TUBE BOILER.

W l. 11 r i no xm UNITED STATES I PAT NT OFFICE.

LOUIS TURGAN, OF PARIS, FRANCE, ASSIGNOR TO' GEORGES 'DORE, OF

SAME PLACE.

WATER-TU BE BOILER.

SPECIFICATION forming part of Letter s'latent No. 652,866, dated J u 1y3, 1900.

Application filed M y 13, 1898. erial No. 680,602. (No model.)

To all whom it may concern.-

Be it' known that I, LOUIS TURGAN, a citizen of the Republic of France, residing at Paris, France, have invented a certain new'and useful Improvement in Water-Tube Steam+l3oilers, (for whichlhave'obtain'ed Letters Patent of France, dated October 18, 1897, No. 271,403, with an addition dated November 23, 1897, bearing the same number, and have applied for Letters Patent of Belgium under date of April 18, 1898;) and I do hereby declare that the following is a full, clear, and exact specification of the same.

The present invention relates to that class of steam-generatorsknown as multitubular or water-tube generators-that is to say, to generators in whichja large portion of the water within the tubes is acted uponpby the hot gases.

The invention has for its object to'provide a generator of that class which shall be simple in construction, in which the series of tubes shall be readily capable of expanding, which shall be easy to take apart for cleaning or other purposes, and in which the circulation of the water shall be accurately guided and controlled and shall take pla'ce rapidly. Furthermore, a special arrangement of tubes provides means in accordance with this invention for effecting a circuitous circulation of the gases, so as to cause a perfect utilization of the same.

In the annexed drawings I have shown, by way of examples, my improvement as applied to a generator comprising a horizontal cylindrical shelland to agenerator comprising a vertical cylindrical shell.

Figure 1 is a vertical cross-section showing the general arrangement of the system as applied to a generator having a horizontal cylindrical shell. Fig 2 is a longitudinal'section on a larger scale, showing one of the water-tubes of a'series. Fig. 3 is a detail showing in plan above the line :1: cc of Fig. 2 one of the means for mounting a tube upon the concentric collector hereinafter referred to. Fig. 4 is a cross-section showing a special arrangement of tube as means for providing screens in return-flame generators. Fig. 5

shows another arrangement of tube capable ofanswering the same purpose. Fig.6 is a similar view to Fig; 1, showing the application of the system to a generator comprising a vertical cylindrical shell..

Referring to Figs. 1 to 5, the boiler comprises a cylindrical horizontal shell (1, into which open tubes b, arranged in two series on either side of a vertical plane through the longitudinal axis of the shell a. The two said series are at an angle to each other and terminate near each side of the grating c of the furnace d. The general arrangement, as clearly shown in the drawings, therefore assumes in cross-section the shape of a triangle, the apex of which is formedbythe shell a, the base by the grating c, and the sides by the two seriesor groups of tubes.

The tubes b are open at their upper ends and issue into the sheila; but in contradistinction to what has hitherto been the case in generators of a similar construction they do not communicate at their lower ends with lowerfcollectors, which are themselves connected to the shell by large tubes at the out.- side of the whole arrangement. The hereindescribed tubes, on the contrary, are closed attheir lower ends by a screw-plug e, which also acts, if required, as a receptacle for sediment which may deposit in the tube.

- 'The tubes b are preferably permanently fastened (while beingcapable of being taken apart) at their upper ends in the shell a. For this purpose I have shown, by way of an example, one of the various means'which can be employed to that end. In .the arrangement illustrated a short length of tube f is permanently fixed in any suitable manner by being screwed or brazed, for instance, into the shell a. At the end thereof which is exterior to the shell 0. the said tube is internally screwb and concentrically therewith, into which they extend downwardly and terminate at a short distance from the screw-plugs e.

The tubes h are open at both ends and may, just like the collector g, be made of very thin metal, since they do not have to resist any pressure.

The collector g is fastened into the shell by any suitable means, such as bolts and ties 2', and is provided with one or more openingsj, by which it communicates with the said shell a. As the joint between the tubes h and the collector 9 need not be water-tight, it maybe obtained by a bayonet-joint. (Shown in Fig. 2 and in plan in Fig. 3.) The tubes h may be guided within the tubes 1) by any suitable support,which may with advantage be merely formed of a small tongue 7:, Fig. 2, punched out of the metal of which the tube h is made and bent so as to bear against the inner wall of the tube 1) or screw-plug e.

The generator operates as follows: The feed takes place solely into the collector g. The cold water flows down the inner tubes it, rises up between the latter and the tubes 1), and reaches, being mixed with steam, the shell a, which is provided with a usual dome Z.

It will be seen that my system of generator as compared with Fields generator offers the advantage that the water is accurately guided or controlled without any possibility of its mixing with the steam while circulating through the internal collector and the tubesa result which it would not be possible to obtain with tubes opening directly into the shell a. Furthermore, the ends of the tubes are out of reach of the furnace-fire, from which they are moreover protected, as well as the joints of the tubes in the shell a, by shields m a, respectively.

By unscrewing the plugs 6 access can be had to the interior of the tubes. The plugs might be provided with small cocks or valves through which when open the sediment could be blown off.

By modifying the exterior shape of the tubes 7) a shield or battle-plate can be formed for causing the flames to follow a return course in return-flame generators. Each tube 1) can be provided, for instance, with two longitudinal external ribs 0, either arranged on a plane passing through the center of the tubes or otherwise. By arranging the tubes as shown in Fig. 4 it will be seen thata shield will readily be formed. It is also possible to employ tubes 1), Fig. 5, of a larger diameter than that of the tubes 1) and reduce them at b at each end at the point wherein they ongage the shell (0 and pass through the shield 12..

I do not limit my invention strictly to the arrangement shown, for it would be possible to cause it to undergo modifications without departing from the principle of the said invention. For instance, the shell a might be duplicated, so as to provide a distinct shell for each series of tubes, all the other arrangements otherwise remaining the same. Socalled double-front generators might also be constructed by arranging in the extension of each other two generators similar to the one herein described, and by suitably modifying the furnace it will be possible to render the generator capable of being applied to locomotives.

I have herein so far described a generator comprising a horizontal cylindrical shell; but my invention is equally applicable to generators comprising a cylindrical vertical shell, as shown in Fig. 6. In this instance the interior collector 9 opens above the water-level and communicates, on the other hand, at the bottom with the interior of the shell a by a bent nozzle 1), the object being to collect the sediment at the bottom of g, while at the same time supplying water at a low temperature to the bottom of a in the region most exposed to the action of the furnace. The compound tubes Z) 71 arranged as previously described, radiate from the shell a. They are preferably somewhat inclined with reference to the horizon and are supported at their free ends by the boiler-casing q, which for this purpose is provided with suitably-arranged openings. A jacket r surrounds the ends of the tubes projecting from the casing q.

The details as to the fitting and construction of this arrangement remain the same as those previously described.

I claim-- In a tubular boiler or steam-generator the combination with the'generator of a collector of the form of a partial cylinder suspended along its free edges within said generator, the open side of said generator being in the steam-space, sets of circulator-tubes, each composed of an outer tube closed at its lower end and communicating at its inner end with the generator, and inner tubes bayonet-jointed to the collector and extending from the latter to near the lower end of each circulatortube, said sets of tubes forming legs arranged to straddle a furnace, substantially as described.

In witness whereof I have hereunto set my hand, this 3d day of May, 1808, in the presence of two subscribing witnesses.

LOUIS TURGAN.

\Vitnesses:

DOUGLAS H. BRANDON, PAUL FLICOTEAU. 

